One pain point in recent years is the Migrate Settings. You are prompted the first time you open a brand new install to migrate your settings from an older release. When you do this the very first time you run the program and run into problems it provides for painful troubleshooting, because we don't know if it was a bad install or if the migration broke something.
Many times over the years since AutoCAD 2004 I've had to reset he AutoCAD profile back to the default settings and this had to be done manually. Once we had integrated the "Migrate from prior release". It required you edit the Windows Registry (always a risky thing) and removing files and folders of the hard drive.
The "Reset Settings to Default" does what we had to do manually in the past with an option to "backup" your current configuration. This will make things so much better for everyone that has an AutoCAD profile issue.
So, all you do is Exit AutoCAD and click the Windows Start>All Programs>Autodesk>AutoCAD 2012>Reset Settings to Default icon.
Note: The path will be different depending on your Operating System and AutoCAD vertical program.
Select the option to Backup and Reset.
Browse to and save the backup file.
Then you will receive the confirmation dialog.
Now your AutoCAD profile (and files) have been removed. The next time you launch AutoCAD it will kick off the secondary installer just like it did the very first time you ran it. Thank you Autodesk!!!